projects / thirdparty / openssl.git / blame
| Commit | Line | Data |
|---|---|---|
| dfeab068 RE |
1 | #include <stdio.h> |
| 2 | #include <stdlib.h> | |
| 3 | #include <string.h> | |
| ec577822 BM |
4 | #include <openssl/objects.h> |
| 5 | #include <openssl/comp.h> | |
| dfeab068 RE |
6 | |
| 7 | COMP_METHOD *COMP_zlib(void ); | |
| 8 | ||
| 9 | #ifndef ZLIB | |
| 10 | ||
| 11 | static COMP_METHOD zlib_method={ | |
| 12 | NID_undef, | |
| 13 | "(null)", | |
| 14 | NULL, | |
| 15 | NULL, | |
| 16 | NULL, | |
| 17 | NULL, | |
| 18 | NULL, | |
| 19 | }; | |
| 20 | ||
| 21 | #else | |
| 22 | ||
| 23 | #include <zlib.h> | |
| 24 | ||
| 25 | static int zlib_compress_block(COMP_CTX *ctx, unsigned char *out, | |
| 26 | unsigned int olen, unsigned char *in, unsigned int ilen); | |
| 27 | static int zlib_expand_block(COMP_CTX *ctx, unsigned char *out, | |
| 28 | unsigned int olen, unsigned char *in, unsigned int ilen); | |
| 29 | ||
| 30 | static int zz_uncompress(Bytef *dest, uLongf *destLen, const Bytef *source, | |
| 31 | uLong sourceLen); | |
| 32 | ||
| 33 | static COMP_METHOD zlib_method={ | |
| 34 | NID_zlib_compression, | |
| 35 | LN_zlib_compression, | |
| 36 | NULL, | |
| 37 | NULL, | |
| 38 | zlib_compress_block, | |
| 39 | zlib_expand_block, | |
| 40 | NULL, | |
| 41 | }; | |
| 42 | ||
| 6b691a5c UM |
43 | static int zlib_compress_block(COMP_CTX *ctx, unsigned char *out, |
| 44 | unsigned int olen, unsigned char *in, unsigned int ilen) | |
| dfeab068 RE |
45 | { |
| 46 | unsigned long l; | |
| 47 | int i; | |
| 48 | int clear=1; | |
| 49 | ||
| 50 | if (ilen > 128) | |
| 51 | { | |
| 52 | out[0]=1; | |
| 53 | l=olen-1; | |
| 54 | i=compress(&(out[1]),&l,in,(unsigned long)ilen); | |
| 55 | if (i != Z_OK) | |
| 56 | return(-1); | |
| 57 | if (ilen > l) | |
| 58 | { | |
| 59 | clear=0; | |
| 60 | l++; | |
| 61 | } | |
| 62 | } | |
| 63 | if (clear) | |
| 64 | { | |
| 65 | out[0]=0; | |
| 66 | memcpy(&(out[1]),in,ilen); | |
| 67 | l=ilen+1; | |
| 68 | } | |
| 69 | fprintf(stderr,"compress(%4d)->%4d %s\n",ilen,(int)l,(clear)?"clear":"zlib"); | |
| 70 | return((int)l); | |
| 71 | } | |
| 72 | ||
| 6b691a5c UM |
73 | static int zlib_expand_block(COMP_CTX *ctx, unsigned char *out, |
| 74 | unsigned int olen, unsigned char *in, unsigned int ilen) | |
| dfeab068 RE |
75 | { |
| 76 | unsigned long l; | |
| 77 | int i; | |
| 78 | ||
| 79 | if (in[0]) | |
| 80 | { | |
| 81 | l=olen; | |
| 82 | i=zz_uncompress(out,&l,&(in[1]),(unsigned long)ilen-1); | |
| 83 | if (i != Z_OK) | |
| 84 | return(-1); | |
| 85 | } | |
| 86 | else | |
| 87 | { | |
| 88 | memcpy(out,&(in[1]),ilen-1); | |
| 89 | l=ilen-1; | |
| 90 | } | |
| 91 | fprintf(stderr,"expand (%4d)->%4d %s\n",ilen,(int)l,in[0]?"zlib":"clear"); | |
| 92 | return((int)l); | |
| 93 | } | |
| 94 | ||
| 6b691a5c UM |
95 | static int zz_uncompress (Bytef *dest, uLongf *destLen, const Bytef *source, |
| 96 | uLong sourceLen) | |
| dfeab068 RE |
97 | { |
| 98 | z_stream stream; | |
| 99 | int err; | |
| 100 | ||
| 101 | stream.next_in = (Bytef*)source; | |
| 102 | stream.avail_in = (uInt)sourceLen; | |
| 103 | /* Check for source > 64K on 16-bit machine: */ | |
| 104 | if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR; | |
| 105 | ||
| 106 | stream.next_out = dest; | |
| 107 | stream.avail_out = (uInt)*destLen; | |
| 108 | if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR; | |
| 109 | ||
| 110 | stream.zalloc = (alloc_func)0; | |
| 111 | stream.zfree = (free_func)0; | |
| 112 | ||
| 113 | err = inflateInit(&stream); | |
| 114 | if (err != Z_OK) return err; | |
| 115 | ||
| 116 | err = inflate(&stream, Z_FINISH); | |
| 117 | if (err != Z_STREAM_END) { | |
| 118 | inflateEnd(&stream); | |
| 119 | return err; | |
| 120 | } | |
| 121 | *destLen = stream.total_out; | |
| 122 | ||
| 123 | err = inflateEnd(&stream); | |
| 124 | return err; | |
| 125 | } | |
| 126 | ||
| 127 | #endif | |
| 128 | ||
| 6b691a5c | 129 | COMP_METHOD *COMP_zlib(void) |
| dfeab068 RE |
130 | { |
| 131 | return(&zlib_method); | |
| 132 | } | |
| 133 |